#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.
#

import json
import dbus
from dbus.mainloop.glib import DBusGMainLoop
import gi
gi.require_version('Gst', '1.0')
from gi.repository import GObject, GLib, Gst


class GenericMonitor:

    def setupMonitor(self):
        self._activated = True
        self._encoder = json.JSONEncoder()
        self._dbus_interface = 'com.soutade.GenericMonitor'

        dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
        self._dbus = dbus.SessionBus()

        self.systray_proxy = self._dbus.get_object('org.gnome.Shell', '/com/soutade/GenericMonitor')

        self._dbus.add_signal_receiver(self.onClick,         'onClick',         self._dbus_interface)
        self._dbus.add_signal_receiver(self.onDblClick,      'onDblClick',      self._dbus_interface)
        self._dbus.add_signal_receiver(self.onRightClick,    'onRightClick',    self._dbus_interface)
        self._dbus.add_signal_receiver(self.onDblRightClick, 'onDblRightClick', self._dbus_interface)

        self._dbus.add_signal_receiver(self.onActivate,      'onActivate',      self._dbus_interface)
        self._dbus.add_signal_receiver(self.onDeactivate,    'onDeactivate',    self._dbus_interface)

    def runMainLoop(self):
        self._mainLoop = GLib.MainLoop()
        self._mainLoop.run()

    def stopMainLoop(self):
        self._mainLoop.quit()

    # Generic Monitor functions
    def notify(self, group):
        if self._activated:
            if type(group) == GenericMonitorGroup:
                group = group.getValues()
            self.systray_proxy.notify(self._encoder.encode(group), dbus_interface=self._dbus_interface)

    def deleteItems(self, items):
        if self._activated:
            self.systray_proxy.deleteItems(self._encoder.encode(items), dbus_interface=self._dbus_interface)

    def deleteGroups(self, groups):
        if self._activated:
            self.systray_proxy.deleteGroups(self._encoder.encode(groups), dbus_interface=self._dbus_interface)

    # Generic Monitor signals
    def onClick(self, sender):
        pass

    def onRightClick(self, sender):
        pass
    
    def onDblClick(self, sender):
        pass

    def onDblRightClick(self, sender):
        pass

    def onActivate(self):
        self._activated = True

    def onDeactivate(self):
        self._activated = False

    # DBUS method
    def add_signal_receiver(self, callback, signalName, interface):
        self._dbus.add_signal_receiver(callback, signalName, interface)


class GenericMonitorItem:
    def __init__(self, name, text='', style='', icon='', iconStyle='', onClick='', box=''):
        self.name = name
        self.text = text
        self.style= style
        self.icon = icon
        self.iconStyle = iconStyle
        self.onClick = onClick
        self.box = box
        
        self._checkValues()

    def _checkValues(self):
        if self.onClick and not self.onClick in ('signal', 'delete'):
            raise ValueError('Invalid onClick value')
        if self.box and not self.box in ('left', 'center', 'right'):
            raise ValueError('Invalid box value')
        
    def toMap(self):
        myMap = {"name":self.name}
        for p in ('text', 'style', 'icon', 'box'):
            if self.__dict__[p]:
                myMap[p] = self.__dict__[p]
        if self.iconStyle:
            myMap['icon-style'] = self.iconStyle
        if self.onClick:
            myMap['on-click'] = self.onClick
        return [myMap]

class GenericMonitorGroup:
    def __init__(self, name, items=[]):
        self.name = name
        if type(items) != list:
            self.items = [items]
        else:
            self.items = items

    def addItem(self, item):
        self.items.append(item)

    def addItems(self, items):
        for item in items:
            self.addItem(item)

    def getValues(self):
        res = {'group': self.name, 'items':[]}
        for item in self.items:
            res['items'] += item.toMap()
        return res

    def __str__(self):
        return str(self.getValues())